Why not buying from their website itself , because I just checked their website and they accept Bitcoin unless you are looking for something cheaper (not sure why someone would buy it to sell it cheaper though).
Some people do, i have seen some sell for half the price, not the cracked, legit ones. I don't know how, was just expecting if anyone has to offer, or if someone doesn't want to use their account anymore, reselling. I can buy from their website 1 yr for 36$ so i just wanted to wait few days and check if someone wants to sell for cheap.